diff --git a/driver/battery/smart.c b/driver/battery/smart.c
index 9e7e9f3ec6..15dd72ff29 100644
--- a/driver/battery/smart.c
+++ b/driver/battery/smart.c
@@ -22,16 +22,6 @@
 
 static int fake_state_of_charge = -1;
 
-test_mockable int sbc_read(int cmd, int *param)
-{
-	return i2c_read16(I2C_PORT_CHARGER, CHARGER_ADDR, cmd, param);
-}
-
-test_mockable int sbc_write(int cmd, int param)
-{
-	return i2c_write16(I2C_PORT_CHARGER, CHARGER_ADDR, cmd, param);
-}
-
 test_mockable int sb_read(int cmd, int *param)
 {
 #ifdef CONFIG_BATTERY_CUT_OFF
diff --git a/driver/charger/bq24707a.c b/driver/charger/bq24707a.c
index 67467610df..ce49478d67 100644
--- a/driver/charger/bq24707a.c
+++ b/driver/charger/bq24707a.c
@@ -10,6 +10,7 @@
 #include "charger.h"
 #include "console.h"
 #include "common.h"
+#include "i2c.h"
 #include "util.h"
 
 /* Sense resistor configurations and macros */
@@ -39,6 +40,16 @@ static const struct charger_info bq24707a_charger_info = {
 
 /* bq24707a specific interfaces */
 
+static inline int sbc_read(int cmd, int *param)
+{
+	return i2c_read16(I2C_PORT_CHARGER, CHARGER_ADDR, cmd, param);
+}
+
+static inline int sbc_write(int cmd, int param)
+{
+	return i2c_write16(I2C_PORT_CHARGER, CHARGER_ADDR, cmd, param);
+}
+
 int charger_set_input_current(int input_current)
 {
 	return sbc_write(BQ24707_INPUT_CURRENT,
diff --git a/driver/charger/bq24715.c b/driver/charger/bq24715.c
index 4386c3a17d..507c44e7da 100644
--- a/driver/charger/bq24715.c
+++ b/driver/charger/bq24715.c
@@ -10,6 +10,7 @@
 #include "charger.h"
 #include "console.h"
 #include "common.h"
+#include "i2c.h"
 #include "util.h"
 
 /* Sense resistor configurations and macros */
@@ -34,6 +35,16 @@ static const struct charger_info bq24725_charger_info = {
 	.input_current_step = REG_TO_CURRENT(INPUT_I_STEP, R_AC),
 };
 
+static inline int sbc_read(int cmd, int *param)
+{
+	return i2c_read16(I2C_PORT_CHARGER, CHARGER_ADDR, cmd, param);
+}
+
+static inline int sbc_write(int cmd, int param)
+{
+	return i2c_write16(I2C_PORT_CHARGER, CHARGER_ADDR, cmd, param);
+}
+
 int charger_set_input_current(int input_current)
 {
 	return sbc_write(BQ24715_INPUT_CURRENT,
diff --git a/driver/charger/bq24735.c b/driver/charger/bq24735.c
index 3c40d674f2..24a71c1deb 100644
--- a/driver/charger/bq24735.c
+++ b/driver/charger/bq24735.c
@@ -10,6 +10,7 @@
 #include "charger.h"
 #include "console.h"
 #include "common.h"
+#include "i2c.h"
 #include "util.h"
 
 /* Sense resistor configurations and macros */
@@ -39,6 +40,16 @@ static const struct charger_info bq24735_charger_info = {
 
 /* bq24735 specific interfaces */
 
+static inline int sbc_read(int cmd, int *param)
+{
+	return i2c_read16(I2C_PORT_CHARGER, CHARGER_ADDR, cmd, param);
+}
+
+static inline int sbc_write(int cmd, int param)
+{
+	return i2c_write16(I2C_PORT_CHARGER, CHARGER_ADDR, cmd, param);
+}
+
 int charger_set_input_current(int input_current)
 {
 	return sbc_write(BQ24735_INPUT_CURRENT,
diff --git a/include/battery_smart.h b/include/battery_smart.h
index c5fd1d6eec..72b4cf6544 100644
--- a/include/battery_smart.h
+++ b/include/battery_smart.h
@@ -137,12 +137,6 @@
 #define BATTERY_DISCHARGING_DISABLED    0x20
 #define BATTERY_CHARGING_DISABLED       0x40
 
-/* Read from charger */
-int sbc_read(int cmd, int *param);
-
-/* Write to charger */
-int sbc_write(int cmd, int param);
-
 /* Read from battery */
 int sb_read(int cmd, int *param);